The expression is .
(Substitute x = 7.1, y = –2.5)
(Product of two same signs is positive)
(Subtract: )
The value of expression is – 4.6.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=dd6579f77e6c05544364661b16d7690b.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=b6104726b5daa831f9410342c6408223.png\")
(Substitute x = 7.1, y = –2.5)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e280e105dddd5133229f16213513d618.png\")
(Product of two same signs is positive)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e1e6669b2e65a430b3817b663146b360.png\")
(Subtract: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=49024e4daf9e0eac899ef8c3a1561c07.png\")
)![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")